body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

code {
  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
    monospace;
}

.flex{
  display: flex;
}
.column{
  flex-direction: column;
}
.row-reverse{
  flex-direction: row-reverse;
}
.j-around{
  justify-content: space-around;
}
.j-between{
  justify-content: space-between;
}
.j-center{
  justify-content: center;
}
.a-center{
  align-items: center;
}
.j-end{
  justify-content: end;
}
.a-end{
  align-items: flex-end;
}
.indent{
  text-indent: 4em;
}
.indent-2{
  text-indent: 2em;
}
.bred{
  border: 1px red solid;
}
.wrap{
  flex-wrap: wrap;
}
.demo{
  background-color: aqua !important;
  color: white !important;
}